Diastereocontrolled reduction of cyclic β-enaminones. A new diastereoselective route to 2,6-disubstituted piperidines
作者:Stéphanie Fréville、Philippe Delbecq、Vu Moc Thuy、Huguette Petit、Jean Pierre Célérier、Gérard Lhommet
DOI:10.1016/s0040-4039(01)00770-5
日期:2001.7
A new diastereoselective synthesis of 2,6-disubstituted piperidinic alkaloids is presented. Three natural compounds, the (−)-pinidinone 1a, the (+)-dihydropinidine 1b and the (−)-pinidinol 1c were prepared from optically pure (6R)-6-methylpiperidin-2-one 2. This method is based on the chemo- and diastereocontrolled reductions of an exocyclic β-enamino ketone.
提出了一种新的非对映选择性合成2,6-二取代哌啶生物碱的方法。三种天然化合物中,( - ) - pinidinone 1A中,(+) - dihydropinidine 1B pinidinol -和( - )1C由光学纯(6制备- [R)-6-甲基哌啶-2-酮2。该方法基于环外β-烯胺酮的化学和非对映异构控制的还原。